| Birzenbach | |
| Mouth Coordinates: | 50.5003°N 7.5056°W |
| Progression: | Engelsbach→ Aubach→ |
| Subdivision Type1: | Country |
| Subdivision Type2: | State |
Birzenbach is a river of Rhineland-Palatinate, Germany. It springs west of Hardert. It flows southward and discharges at the eastern outskirts of Rengsdorf into the Engelsbach from the right.